Casey Parsons, adoptive mother to Erica who has been missing since November of 2011, says her daughter is living with “Nan”, (Irene “Nan” Goodman) who Casey says she believes to be Erica’s paternal, biological grandmother.

Police say there is no “Nan” and Erica’s biological grandmother has been dead for five years. But Casey says two other women who know “Nan” were present the last time Erica went to visit. She says police questioned them, and this proves she’s not making “Nan” up.

So why hasn’t “Nan” come forward to let Erica’s parents and authorities know where she and Erica are? Watch the video above as Dr. Phil probes into this mystery!